PDF Merger
Combine multiple PDF files into one document.
Drop PDF files here or click to upload — drag to reorder
Merge PDF files in your browser — no upload
Combine two or more PDF files into a single document. Drag to reorder pages, then download the merged PDF. All processing happens locally using pdf-lib — your files never leave your device.
Frequently asked questions
- How many PDFs can I merge?
- There is no hard limit — you can merge as many PDFs as your device's memory allows. Very large PDFs (over 100 MB each) may be slow on lower-end devices.
- Will the merged PDF keep bookmarks and hyperlinks?
- Links and annotations within each PDF are preserved. However, cross-document bookmarks are not automatically created in the merged output. The page order matches the order you set in the tool.
- Can I merge password-protected PDFs?
- The tool can attempt to load password-protected PDFs. If they are encrypted without a password (owner password only), they will merge. User-password-encrypted PDFs cannot be loaded without entering the password.